python - 如何使用 Django Rest Framework 删除对象

Question

我正在尝试使用 Django Rest Framework 为我的事件计划应用程序编写 RESTful API，但在使用不需要 GET HTTP 方法的 View 时遇到了一些麻烦。我已经阅读了 DRF 网站上的教程。根据我阅读教程和 Django 站点上基于类的 View 文档后的理解，如果有这样一个基于类的 View (取自 DRF 教程)

class SnippetDetail(APIView):
    """
    Retrieve, update or delete a snippet instance.
    """
    def get_object(self, pk):
        try:
            return Snippet.objects.get(pk=pk)
        except Snippet.DoesNotExist:
            raise Http404

    def get(self, request, pk, format=None):
        snippet = self.get_object(pk)
        serializer = SnippetSerializer(snippet)
        return Response(serializer.data)

    def put(self, request, pk, format=None):
        snippet = self.get_object(pk)
        serializer = SnippetSerializer(snippet, data=request.DATA)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def delete(self, request, pk, format=None):
        snippet = self.get_object(pk)
        snippet.delete()
        return Response(status=status.HTTP_204_NO_CONTENT) 

View 中不同的方法对应不同的HTTP Request方法。因此，如果我有 www.foo.com/bar，它会根据发送到该地址的请求方法做两件不同的事情。所以这意味着我不必指定任何其他内容，因为执行的函数是根据发送 URL 的方法确定的。这是正确的吗？

我有这个 View ，我试图根据 DRF 站点上的示例建模

class EventDetail(APIView):

    """
    Retrieve, update or delete a event instance.
    """

    def get_object(self, pk):
        try:
            return Event.objects.get(pk=pk)
        except Event.DoesNotExist:
            raise Http404

    def get(self, request, pk, format=None):
        event = self.get_object(pk)
        serializer = EventSerializer(event)
        return Response(serializer.data)

    def post(self, request, format=None):
        serializer = EventSerializer(data=request.DATA)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    # def put(self, request, pk, format=None):
    #     event = self.get_object(pk)
    #     serializer = EventSerializer(event, data=request.DATA)
    #     if serializer.is_valid():
    #         serializer.save()
    #         return Response(serializer.data)
    #     return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def delete(self, request, pk, format=None):
        event = self.get_object(pk)
        event.delete()
        return Response(status=status.HTTP_204_NO_CONTENT

哪些映射到这些 URL

urlpatterns = patterns('',

                       # Get event
                       url(r'^(?P<pk>\d+)/$', views.EventDetail.as_view(),
                           name='create_events'),
                       # list all events
                       url(r'^list/$', views.EventList.as_view(),
                           name='list_events'),
                       # url(r'^update$/(?P<pk>\d+)', #update event),
                       url(r'^create/$', views.EventDetail.as_view(),
                           name='create_events'),
                       # delete event
                       url(r'^delete$/(?P<pk>\d+)',
                           views.EventDetail.as_view(), name='delete_event'),

                       )

我正在尝试通过此命令使用 CURL 进行测试(如此处建议的 DELETE using CURL with encoded URL )

curl -X DELETE "http://127.0.0.1:8000/events/delete/1"

这似乎做了它应该做的事情:

[18/Oct/2014 22:41:27] "DELETE /events/delete/1 HTTP/1.1" 404 2707

但实际记录并没有从我的数据库中删除

这里有什么我忘记做的事情来让它正常工作吗？

Answer 1

你是多余的。 HTTP方法已经是DELETE , 所以没有 /events/delete在网址中。试试这个:

curl -X DELETE "http://127.0.0.1:8000/events/1/"

默认情况下，DRF 的路由器在 /event/<pk> 处创建详细的 url。还有你GET , PUT , POST和 DELETE它们分别检索、更新、创建和删除。